Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7cedb86689fbbe2…

MALICIOUS

PDF

40.2 KB Created: 2020-10-14 18:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6ad8475028b466b03e478cb17a52dcb1 SHA-1: 626078f5cf8465c9893271b2f0b31fd9758c4620 SHA-256: e7cedb86689fbbe2a995098c8416eb9dde7e7f797d56d0b19112bbbf0f518ca7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file functions as a link farm, containing numerous links to external websites. One of these links, https://cctraff.ru/strik?keyword=hindu+baby+boy+names+pdf+format, is identified as a malicious redirector. The document's structure and the presence of a malicious redirector suggest an attempt to lure users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?keyword=hindu+baby+boy+names+pdf+format In PDF document text
    • https://site-1040432.mozfiles.com/files/1040432/77766052006.pdfIn PDF document text
    • https://site-1044498.mozfiles.com/files/1044498/mudajojaramoxe.pdfIn PDF document text
    • https://site-1040373.mozfiles.com/files/1040373/wexuropudogop.pdfIn PDF document text
    • https://site-1039925.mozfiles.com/files/1039925/46321640278.pdfIn PDF document text
    • https://site-1040977.mozfiles.com/files/1040977/gesezuxari.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/3e75a4e696b2f2d.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/zutilipevozafeguwu.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdfIn PDF document text
    • https://site-1043218.mozfiles.com/files/1043218/95075171045.pdfIn PDF document text
    • https://site-1039517.mozfiles.com/files/1039517/bipizufogogakivewixuvob.pdfIn PDF document text
    • https://site-1043160.mozfiles.com/files/1043160/82686130825.pdfIn PDF document text
    • https://site-1039898.mozfiles.com/files/1039898/25772833022.pdfIn PDF document text
    • https://site-1038759.mozfiles.com/files/1038759/jigezusofeva.pdfIn PDF document text
    • https://site-1041188.mozfiles.com/files/1041188/pibebupunebuwusuz.pdfIn PDF document text
    • https://site-1042100.mozfiles.com/files/1042100/gezukumaxevenitu.pdfIn PDF document text
    • https://site-1041695.mozfiles.com/files/1041695/38439753773.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/ff06dfdf.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://site-1043660.mozfiles.com/files/1043660/46982032115.pdfIn PDF document text
    • https://site-1042556.mozfiles.com/files/1042556/72549845172.pdfIn PDF document text
    • https://site-1037906.mozfiles.com/files/1037906/kugitofufagimowo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF8 5356 bytes
SHA-256: 8815e096353d0d62d1b7c5ff6ccc6116a50277102feff058483c051ffe00ba29
font_01_sfnt_off00007112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7112 10144 bytes
SHA-256: 539750a312b1d974dc1c27afdf2bc950ec5d2810d3a4f0fde6783e7aaeca2ff5